Illumination Converter - Convert Candela, Lumen, Candlepower & More Units
Result:
100 cd = 7.95798186 lm
How Our Illumination Converter Works
Our illumination converter helps you change light measurements from one unit to another. This tool is perfect for lighting designers, engineers, and anyone working with light sources. You can convert candela to lumen, candlepower to stilb, and many other light units quickly.
The illumination converter uses exact formulas to give you accurate results. Whether you need to convert LED bulb ratings or calculate stage lighting, this converter makes it simple. Just enter your value, pick your units, and get instant results.
Enter Light Value
Type your illumination number
Pick Light Units
Choose from candela, lumen, candlepower
Get Results
See converted illumination value
Illumination Conversion Formulas
These formulas help you understand how the illumination converter works. Each light unit has a different scale, so we use math to change between them. The candela converter uses these exact formulas to give you correct answers every time.
Learning these formulas helps you check your work and understand light measurements better. The lumen converter and candlepower converter both use simple math that anyone can learn.
Candela to Lumen Formula
lm = cd × 12.566
Example: 100 candela = 100 × 12.566 = 1256.6 lumen
This formula converts luminous intensity to luminous flux
Candela to Candlepower Formula
cp = cd × 1.0194
Example: 50 candela = 50 × 1.0194 = 50.97 candlepower
Candlepower is an older unit still used in some industries
Lumen to Candela Formula
cd = lm ÷ 12.566
Example: 628 lumen = 628 ÷ 12.566 = 49.97 candela
Reverse calculation from luminous flux to intensity
Stilb to Candela Formula
cd = sb × 10000
Example: 0.5 stilb = 0.5 × 10000 = 5000 candela
Stilb is a very bright unit used for intense light sources
Illumination Conversion Table
This table shows common illumination conversions you might need. The candela converter calculations help you understand how bright different light sources are. Use this table to quickly find lumen, candlepower, stilb, and lambert values.
Each row shows the same light intensity in different units. This helps you compare LED bulbs, car lights, and other light sources easily. The illumination converter uses these exact relationships for all calculations.
| Candela (cd) | Lumen (lm) | Candlepower (cp) | Stilb (sb) | Lambert (L) |
|---|---|---|---|---|
| 1 | 12.6 | 1.02 | 10,000 | 3183 |
| 5 | 62.8 | 5.10 | 50,000 | 15916 |
| 10 | 125.7 | 10.19 | 100,000 | 31831 |
| 20 | 251.3 | 20.39 | 200,000 | 63662 |
| 25 | 314.2 | 25.49 | 250,000 | 79578 |
| 50 | 628.3 | 50.97 | 500,000 | 159155 |
| 75 | 942.5 | 76.46 | 750,000 | 238733 |
| 100 | 1256.6 | 101.94 | 1,000,000 | 318310 |
| 150 | 1884.9 | 152.91 | 1,500,000 | 477465 |
| 200 | 2513.2 | 203.88 | 2,000,000 | 636620 |
| 250 | 3141.5 | 254.85 | 2,500,000 | 795775 |
| 300 | 3769.8 | 305.82 | 3,000,000 | 954930 |
| 400 | 5026.4 | 407.76 | 4,000,000 | 1273240 |
| 500 | 6283.0 | 509.70 | 5,000,000 | 1591550 |
| 1000 | 12566.0 | 1019.40 | 10,000,000 | 3183100 |
Note: These conversions assume a point light source with uniform distribution. Real-world values may vary based on light design and beam patterns.
Illumination Conversion Chart
This chart shows how candela values convert to other light units. Use this as a quick reference when working with different illumination measurements. The luminous intensity converter uses these same relationships to give you accurate results.
10 cd
25 cd
50 cd
100 cd
200 cd
500 cd
Common Illumination Examples
These examples show how to use the illumination converter for real situations. Practice with these problems to learn how candela, lumen, and candlepower work together. The lighting calculator makes these conversions easy, but knowing the math helps you understand light better.
Each example uses the same formulas that our luminous intensity converter uses. Try solving these problems yourself, then check your answers with our tool.
LED Bulb Rating:
Convert 75 candela to lumens for bulb specs
Answer: 75 × 12.566 = 942.45 lumen
Common for household LED bulbs
Flashlight Output:
Convert 1500 lumens to candela for beam intensity
Answer: 1500 ÷ 12.566 = 119.37 candela
Typical high-power flashlight rating
Car Headlight:
Convert 60 candela to candlepower for regulations
Answer: 60 × 1.0194 = 61.16 candlepower
Automotive lighting standards
Stage Light:
Convert 0.5 stilb to candela for theater design
Answer: 0.5 × 10000 = 5000 candela
Professional stage lighting calculation
Vintage Bulb:
Convert 250 candlepower to lumens for comparison
Answer: (250 ÷ 1.0194) × 12.566 = 3081.5 lumen
Old-style incandescent bulb rating
Phone Camera Flash:
Convert 25 candela to lumens for photo specs
Answer: 25 × 12.566 = 314.15 lumen
Smartphone flash LED output
Where You Use Illumination Conversion
The illumination converter helps in many everyday situations. From buying LED bulbs to designing stage lights, you need to understand different light units. Our photometry converter makes these tasks simple and accurate.
Whether you work with lighting design or just want to compare bulb brightness, this light source converter gives you the right numbers. These real-world uses show why illumination conversion matters.
Home Lighting
Compare LED bulb brightness and choose the right lumen rating for each room
Car Lights
Check headlight and taillight candela ratings meet safety standards
Phone Screens
Set display brightness using candela per square meter measurements
Theater Design
Calculate stage lighting using stilb and candlepower for perfect shows
Safety Lights
Ensure emergency beacons meet required luminous intensity standards
Photography
Set camera flash and studio light output using lumen and candela values
Understanding Light Units
Different light units measure different things about illumination. The candela measures how bright a light source looks from one direction. The lumen measures the total light output in all directions. Understanding these differences helps you use the illumination converter correctly.
The candlepower is an older unit that works like candela but uses a different scale. Stilb and lambert measure very bright lights like car headlights or stage lights. Our lighting calculator handles all these units automatically.
Candela (cd)
Measures light intensity in one direction. Used for LED bulbs, car lights, and flashlights.
Base unit for luminous intensity
Lumen (lm)
Measures total light output. Common on bulb packages and lighting specs.
Total luminous flux from source
Candlepower (cp)
Older unit similar to candela. Still used in some automotive and marine applications.
Traditional intensity measurement
Stilb (sb)
Very bright unit for intense light sources like projectors and searchlights.
High-intensity applications
Frequently Asked Questions
How does the illumination converter work?
The illumination converter uses exact math formulas to change between light units. You enter a number, pick your units, and get instant results. The candela converter, lumen converter, and other tools all use the same accurate calculations.
What is the difference between candela and lumen?
Candela measures light intensity in one direction, like a laser pointer. Lumen measures total light output in all directions, like a light bulb. The luminous intensity converter helps you change between these measurements easily.
When do I use candlepower instead of candela?
Candlepower is an older unit still used in some industries like automotive and marine lighting. The candlepower converter helps you work with older specifications or regulations that still use this unit.
Is this photometry converter accurate for all light types?
Yes, the photometry converter works for LED, incandescent, fluorescent, and other light sources. The math formulas are the same regardless of the light technology used.
Save and Share Results
Save your illumination conversion results for later use or share them with others. The light source converter calculations can be printed or downloaded for your records.